From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: devel@linuxdriverproject.org
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
Stephen Hemminger <sthemmin@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Jork Loeser <jloeser@microsoft.com>,
Ladi Prosek <lprosek@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH v2 0/2] hyper-v: avoid tsc calibration
Date: Thu, 22 Jun 2017 18:07:28 +0800 [thread overview]
Message-ID: <20170622100730.18112-1-vkuznets@redhat.com> (raw)
Changes since v1:
- s/AVAILABELE/AVAILABLE/ fixing the typo [Thomas Gleixner]
Original description:
TSC calibration on virtual machines is always error prone. It was found
that in nested environments Gen2 instances may get stuck on boot. As
Hyper-V hosts provide us with all the required information we can easily
avoid calibration. This is already done for other hypervisors (KVM,
Vmware).
Vitaly Kuznetsov (2):
hyper-v: check frequency MSRs presence according to the specification
hyper-v: read TSC frequency from a synthetic MSR
arch/x86/include/uapi/asm/hyperv.h | 15 ++++++---------
arch/x86/kernel/cpu/mshyperv.c | 18 +++++++++++++++++-
2 files changed, 23 insertions(+), 10 deletions(-)
--
2.9.4
next reply other threads:[~2017-06-22 10:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-22 10:07 Vitaly Kuznetsov [this message]
2017-06-22 10:07 ` [PATCH v2 1/2] hyper-v: check frequency MSRs presence according to the specification Vitaly Kuznetsov
2017-06-22 13:40 ` [tip:x86/hyperv] x86/hyperv: Check " tip-bot for Vitaly Kuznetsov
2017-06-22 10:07 ` [PATCH v2 2/2] hyper-v: read TSC frequency from a synthetic MSR Vitaly Kuznetsov
2017-06-22 13:40 ` [tip:x86/hyperv] x86/hyperv: Read " tip-bot for Vitaly Kuznetsov
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